ABSTRACT FOR THE MONTH OF DECEMBER, 1904. 



Meteorological Observations, McGill College Observatory, Montreal, Canada. Height above sea level, 187 feet. C. H. MoLEOD, Superintendent. 



=== 



THERMOMETER. 



* BAROMETER. 



[Mean 



relative 

 humid- 



WIND. 



oil 



3i t/i 



■07 

 48 



1.3a 



JJ 



« i 





DAY 



t 

 Mean. 



Mil. 



Mia. 



R.n e e 



t 

 Mean. 



Mai. 



Mio. 



Rao S e. 



direction. 



Mean 

 velocity 

 in miles 

 per hour. 



DAY. 





22.5 

 II. 9 



137 



7.1 



4* 



— a-3 



4 7 

 o.o 



6.2 

 6.1 



7.7 



ills 



0.4 



8.9 



ii 



— '•7 



—7 4 



■ 8.1 

 ■3.3 

 7 S 



s.» 



33-4 



18.0 

 ai.s 

 15.6 



16.6 

 as .7 



3«4 



75 

 3» . 



1.6 

 6.0 

 8-5 



B.'e 



11. 8 

 10.6 



'7 4 



07.7 



T, 



13. J 



6io 



34 S 



7-7 

 3S-4 



30.3 

 0.8 

 7-9 



5-9 

 9.0 



5-3 

 -3.8 

 —7 3 



-6-5 

 —3.6 



s.' 



— 1!6 



0.6 



iii 



-5S 



—5-3 



6.4 



— S.3 



7-0 



161 



i!s 



3-9 



7-7 

 7 7 



■8m 

 6.6 



8.1 

 6.6 

 9-5 



■3-4 



33 8 

 n. 5 

 17.6 

 36 



■5-4 

 '75 



5-9 

 33. 5 



30.39 

 3>46 



;o.a8 

 30.05 

 30 04 

 »9 55 

 39.56 

 39.91 

 30.10 



30.17 



30.13 



30.11 



30-37 . 



30.38 



30.18 



30- 14 



39.99 



39.78 

 30.1.9 

 30.19 

 39.90 

 30-36 



30.57 

 30.45 

 39.88 

 39.18 

 39.61 

 39.98 



3). 65 



39 »3 

 30-49 

 305a 



30-34 

 30.34 



09.90 

 39.71 

 30.10 

 30.12 



30.22 

 30. 91 

 30-23 

 30.45 

 30 45 

 30. »4 

 30.20 



39-99 

 39.86 

 30.28 

 30.34 

 30.15 

 30.58 



30.56 

 30.30 

 39.41 



30.11 



.9.89 



29.76 

 29.92 

 30.34 



30.23 

 .9.85 

 29.85 

 29.38 



29.71 

 30.07 



30.10 

 30.05 

 30.05 

 30.23 

 30.22 

 30.13 



29.79 

 30.14 

 39-75 

 39.92 



30.51 

 30.30 

 39-41 



39.89 

 39. S3 



.16 

 ■57 



• 39 



.53 



■39 

 .05 



lis 



.18 



.16 



■39 

 .16 



■4) 



■40 

 .66 



!a6 

 .89 

 ■33 

 .6, 



•37 



88 

 88 

 68 



80 

 90 

 74 

 90 

 80 

 72 

 63 



63 

 73 

 66 

 7S 

 79 

 86 

 83 



74 

 90 



70 

 86 

 87 

 71 



58 

 7' 



94 

 84 

 84 

 94 



S W. 

 S.W. 



W. 



S.W. 

 S.W. 

 S.W. 

 S.W. 

 N.E. 

 N.W. 

 W. 



N.W. 



N.E. 



N.E. 

 N.W. 

 N.E. 

 W. 

 S.W. 



N.E. 

 S. 



w. 

 w. 



N.W. 

 N.E. 

 N.E. 



E. 



N.E. 

 N.E. 



E. 

 N.W. 

 N.E 

 S.W. 



13^6 

 6-5 



6!i 



11. 5 

 8.2 

 16.0 



14.6 

 13.8 

 13.8 



9.0 

 8.4 



■5 5 

 ■S-7 



9 9 

 9" 



9 

 16.5 



■5 5 



81 

 18 



09 



63 



37 

 18 



73 



80 



5* 



35 



■3 



3^ 



i!8 



3 5 

 S3 



i'.i 



5-o 



■ 3 

 ■9 



3o.3 



!ati 



■ 30 



!i8 

 ■35 



.62 

 ■76 



.09 

 •19 



i 



6 

 7 



9 



6 



9 



•5 

 16 



16 

 '7 



a 3 



33 



3 



3' 



27 

 3 1 





944 



t5>4 



» 7 



■> 7 



30 .031 



30.17 



29.87 



■30 



79.2 



N 80" W 



11.65 



28.8 







joYeni.me.n.i 

 loi.nd Including} 





3S« 



11. s 



.4. 



30.03! 







■30 



»3 = 





I 

 1584 



26. 5 



24-3 



3.68 



I 30 Years means 

 <: for and including 

 ( this month. 



ANALYSIS OF WLND RECORD. 



Ureatest mileage in one hour wafl 30 on the 20 th.. 

 Ureatest velocity in gusts wai 40 on the 20th. 



!■■ nil ■.ni i.n i. .,.-,■, ■.!,■.■:■■■. 



Resultant direction. N-80»W. 

 Total mileage, 8,671. 



1D.B! readiags reduced to 

 temperature 32° Fahrenheit. 



L-level and 



t Mean of bi-hourly readings taken from 

 self-recording instruments. 



1 Humidity relative, saturation beine 100. 

 Mean of observations at 8, 15 and 20 hours* 



f 23 years only. J18 years only. 



The greatest heat was 36.4* above zero on the 

 31st- The greatest cold was 14.0° below tero on 

 the 25th, giving a range of temperature of 

 50.1 degrees. 



Warmest day was the 31st. Coldest day was 

 the 25th. 



Highest barometer reading was 30-62 on the 

 frith: lowest barometer was 29.08 on the 28th, 

 giving a range of 1.51 inohes- 



Minimum relative humidity observed, was 15 

 on the 25th. 



Rain fell on 3 days. 



Snow fell on 17 days. 



Rain and Snow on 3 days. 



Aurora on 1 night- 



